11541205541 has 2 divisors, whose sum is σ = 11541205542. Its totient is φ = 11541205540.

The previous prime is 11541205513. The next prime is 11541205553. The reversal of 11541205541 is 14550214511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11131305025 + 409900516 = 105505^2 + 20246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11541205541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11541205241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5770602770 + 5770602771.

It is an arithmetic number, because the mean of its divisors is an integer number (5770602771).

Almost surely, 2^11541205541 is an apocalyptic number.

It is an amenable number.

11541205541 is a deficient number, since it is larger than the sum of its proper divisors (1).

11541205541 is an equidigital number, since it uses as much as digits as its factorization.

11541205541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000, while the sum is 29.

The spelling of 11541205541 in words is "eleven billion, five hundred forty-one million, two hundred five thousand, five hundred forty-one".